Deposition form



8, 1940- v G. G. WANLESS ,995

nnrosnmn FORM 1 Filed July 8, 1937 1N VENTOR.

ATTORNEYS Patented Oct. 8, 1940 PATENT OFFICE DEPOSITION FORM GrahamG. Wanless, Montreal, Quebec, Canada, assignor, by mesne assignments, to United States Rubber Company, New York, N. Y., a

corporation of New Jcrsey I Application July 8, 1937 sen in 152,587 1 Claim. (oig isgtiy This invention relates to a deposition form upon which a rubber coating may be deposited for the production of a pouch on each end there- 'of. i

r. This invention is an improvement upon a double end deposition form disclosed in an application of Harold D. Rice, Serial No. 152,585, filed July 8, 1937. The form described by Harold D. Rice is provided with a pair of spaced pario allel groove-s which extends around the form to produce reinforcing beads on the rim of the mouths or the mouths and flaps of the pouches deposited thereon. The strip of coating deposited on the surface of the form between 15 the grooves is severed so that the pouches can be removed from the opposite ends of the form. I

beads after the pouches are removed from the form.

. The foregoing advantages and other important features of this invention will be more 30 clearly understood by referring to the following description and the accompanying drawing in which:

Fig. 1 is an isometric view of a deposition form embodying this invention; p 35 Fig. 2 is a cross-sectional view of the form on line 22 of Fig. 1;

Fig. 3 is an isometric view of a pouch produced on such form; and

Fig. 4 is a fragmentary view of amodification 40 of the invention shown in Figs. 1 to 3, in which grooves are shown at the base of the ridge for separating the pouches when deposited on the end of the deposition form.

This invention is illustrated in reference to 5 a pouch P (Fig. 3) having a pocket portion P and a mouth M and a flap F for closing same, the edges of which are provided with a reinforcing bead- B. The form may be made of hard vulcanized rubber, aluminum or other suitable to deposition material. Itis provided with opposite side deposition surfaces II and opposite edge deposition surfaces l2 extending. between and contiguous to the side surfaces II, which surfaces are adapted to becompletely covered an aqueous dispersion of rubber to produce a pouch P on each of the opposite ends I3 of the form, the pocket P of the respective pouches being formed on the opposite ends l3 and the mouth M and flap F being formed on the intermediate portion M of the form. A. surface formation is formed on the intermediate portion M to produce the bead B on the mouth and flap of each pouch and to indicate the line of separation between the pouches. As illustrated, the surface formation comprises an abruptly rising ridge l5 extending across the side surfaces II at ofiset positions It and extending ,along the edge surfaces I2 between the-two positions. The rubber deposited from the aqueous dispersions of rubber collects in the corners l1 and 3 formed between the side edges of the ridge and the deposition surf-aces II and I 2 of the form to produce the bead B on the pouch P. The bead B of the pouch P deposited '20 on the left end of the form as: viewed in Fig. 1 isformed in the corner [1. The bead B of the pouch P deposited on the right end of the form In as viewed in Fig. 1 is formed in the corner 18.

The corners I1 and I8 should be relatively sharp to collect a large amount of rubber for the production of thick beads, but they may be slightly rounded as by a small fillet. The thickness of the bead may be increased by undercuttingthe sides of the ridge IE or by providing grooves 22 and 23 along the base of the ridge l5, as shown in Fig. 4. The top corners of the ridge should also be relatively sharp so that the surface tension of the rubber coating across the top of the ridge 15 will produce a weak line in such coating along the top corners.

The top surface of the ridge I5 is made relatively narrow, but suificiently wide to receive the handle l9 provided with a foot 20 anchored in the form It. The upper end of the handle I0 is provided with nuts 2! for securing the handle to a mechanism for conveying the form through a dipping or spraying bath of an aqueous dispersion of rubber.

The rubber coating may be deposited on the form in the conventional manner by either dipping or spraying the form with a suitably compounded aqueous dispersion of rubber.

After the desired thickness of rubber coating has been coagulated and dried on the form, the strip of coating on the top of the ridge is connected to the beads B on the respective pouches by a very weak film of rubber extending along the top corners of the ridge. The strip may be 5 torn along the top corners between the beads by pulling it away from the ridge I5. After the separating strip is removed the bead edges are left sufficiently smooth that no further trimming is required after the pouches are removed from the form.

The distance between the off-set positions I 6 may be made of the desired length to produce a flap of any desired length, or the distance may be made equal to Zero and thereby produce pouches on each end Without any flap.

The term rubber as used herein means rubher or rubber compositions containing suitable compounding ingredients either dispersed with or contained in the coagulated rubber.

While the preferred forms of this'invention have been shown and described herein it will be understood that the changes in the details as shown may be made without departing from the spirit of the invention or the scope of the appended claim.

Having thus described my invention what I desire to claim by Letters Patent is:

An elongated deposition form having side and edge deposition surfaces for receiving a coating for the production of a pouch on each end thereof having a pocket covering the outer end of the form on which it may be deposited and a flap fitting in complementary relation with the flap and mouth opening of the other pouch along the intermediate portion of said surfaces, an abruptly rising ridge extending across said side deposition surfaces at off-set positions and along said edge surfaces between said off-set positions, to produce a bead on the mouth and flap of the respective pouches outlined by the opposite sides of said ridge, and a handle extending through the top surface of said ridge and connected to said form.

GRAHAM G. WANLESS. 

